Employee Benefit Plans (Restricted Shares Activity And Related Information) (Details) - Restricted Stock - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Restricted Awards Activity
Beginning Balance (in shares)			140,606	146,755
Granted (in shares)			35,663	33,159
Vested (in shares)			(43,417)	(41,635)
Ending Balance (in shares)	132,852	138,279	132,852	138,279
Average Market Price at Grant
Outstanding at period start (in dollars per share)			$ 73.87	$ 72.16
Granted (in dollars per share)			91.90	77.54
Vested (in dollars per share)			73.02	72.54
Outstanding at period end (in dollars per share)	$ 78.06	$ 73.58	$ 78.06	$ 73.58
Stock-based compensation expense associated with restricted shares	$ 633	$ 683	$ 1,341	$ 1,345
Unrecognized stock-based compensation expense associated with restricted shares	$ 5,759		$ 5,759
Weighted average period (in years) in which the above amount is expected to be recognized			3 years 1 month 24 days